Don’t assume the whole control board is bad just because the display is throwing a lock error. In just about every E40 call I’ve been on, the actual failure was sitting right at the door latch itself, not buried in the electronics.
This video walks through where the door lock assembly sits on most Electrolux front-load models and what a failed unit looks like once you pull it out.
What Triggers the Electrolux Washer E40 Error Code
The Electrolux Washer E40 Error Code is a door lock circuit fault. The control board sends voltage to the door lock assembly, waits for a confirmation signal back, and if that signal never arrives — or arrives incomplete — it throws E40 (sometimes shown as E41 depending on the exact fault stage). This isn’t the same failure as a door that simply won’t latch mechanically; it’s the electronic side of the lock reporting a problem, though a bent or misaligned door strike is one of the more common physical reasons that signal never completes.
Electrolux actually documents this one directly, and their own support page on the E40/E41 error code and door lock fix confirms the same starting point I check on every service call: the lock assembly and its wiring before anything else.
Start With the Door Strike, Not the Lock Assembly
Before pulling any parts, open the door and look at the strike — the metal piece on the door itself that inserts into the lock mechanism on the cabinet. Over time these loosen, bend slightly, or get knocked out of alignment by an overloaded drum slamming the door. If the strike doesn’t seat fully into the lock, the switch inside never closes completely, and you get E40 even though the lock assembly itself is fine.
I always close the door slowly and watch how it seats before condemning any part. If the door feels like it’s forcing itself into place, or you hear a soft click instead of a firm one, that’s usually your answer right there — realign or tighten the strike mounting screws and retest a cycle. A door lock issue on a washer isn’t all that different from the latch problems I see on dishwasher doors that won’t close or latch — alignment gets overlooked far more often than it should.
Testing the Door Lock Assembly Itself
If the strike lines up fine and the door still won’t confirm locked, the next step is pulling the door lock assembly and testing it with a multimeter. Unplug the washer first. Most Electrolux front-load lock assemblies have two circuits inside — one for the lock solenoid/motor and one for the switch that confirms lock status. You’re checking for continuity on the switch side and proper resistance on the lock motor side. No continuity where you expect it, or an open circuit, means the assembly has failed internally and needs to be replaced — it’s not something that gets repaired in place.
Repair Clinic has a solid breakdown of the Electrolux door lock assembly replacement procedure if you’re getting ready to swap the part yourself, and their Electrolux latch parts listing is worth checking to confirm you’re ordering the right assembly for your specific model — Electrolux used a few different lock designs across their front-load lineup, and they aren’t interchangeable.
Check the Wiring Harness Before You Order a Part
Don’t skip the wiring. The connector at the door lock assembly sits in a spot that flexes every time the door opens and closes, and after enough cycles a wire can fray or a pin can back out of the connector housing. I’ve found a corroded or loose pin cause the exact same E40 code as a fully dead lock assembly — and it costs nothing to check versus replacing a part that didn’t need it. Pull the connector, inspect both sides for discoloration or looseness, and reseat it firmly before you commit to ordering anything.
If you’re chasing this on a Zanussi-badged version of the same washer platform, the fault logic is nearly identical — worth a look at the Zanussi washing machine error code guide since Electrolux and Zanussi share a lot of the same door lock hardware across markets.
When It’s Actually the Control Board
A bad control board causing a false E40 does happen, but it’s the least common cause I run into. Before blaming the board, confirm the lock assembly tested good, the strike is aligned, and the wiring harness checked out clean. If all three of those are solid and the error still won’t clear, that’s when the board becomes the reasonable next suspect — not the first one.
It’s also worth ruling out unrelated symptoms while you’re in there. If the washer locks fine but you’re seeing water issues instead, that’s a different fault path entirely — something more in line with the E10 water fill inlet fault than a door lock problem. And if the door locks and the cycle runs but clothes come out still soaking, check whether the machine is actually spinning but leaving clothes soaking wet — a separate issue that sometimes gets mistaken for a lock fault when the cycle stalls.
The Electrolux Washer E40 Error Code almost always comes down to one of these three things — strike alignment, the lock assembly itself, or the wiring feeding it. Work through them in that order and you’ll usually find it without replacing parts you didn’t need to.
Written by Keith Schneerer
Certified Appliance Tech · Founder, RemoveAndReplace.com
Keith has spent 30+ years repairing machines, starting as a military mechanic and later maintaining food processing equipment before moving into appliance repair. He founded RemoveAndReplace.com to share field-tested repair advice.
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